allen



J.FALLEN. $TEAM GENERATOR.

No. 76,580. v Patented Apr. 14, 1868.

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Letters Patent No. 76,580, dated April 14, 1868.

IMPROVEMIill l IN STEAM-GENERATOR.

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TO ALL WHOM IT MAYOONOERN:

Be it known that I, JOHN F. ALLEN, of Tremo'nt, Westchcstcr county-,in the State of New York, have ini'ented a new and useful Steam-Generator; and I do hereby declare that the following is a full and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference mltrked thereon.

Figure I represents a longitudinal section of my steam-generator, and

Figure II shows a front view and partial section of the same.

In the accompanying drawings, AA A represent chambers, made oval or circular in section, running the whole length of the boiler, and projecting through the after brick wall. These chambers are cast together, three, four, or more, side by side, and provided with suitable openings, a, to form communicationsfrom one to the other. The forward end of these chambers is closed, and made circular, while their after ends are open, and provided with a fianeh, to which a reservoir or chamber,.B, is attached, situated on the outside of the-after brick wall C, for the collection of any sediment, andito which the supply and blow -oii' pipes are attached. I

The chambers A are strengthened near the central part by braces or division-plates b, runninglengthways, and are slightly inclined upwards, for the purpose of allowing the particlcs of steam and water to pass easily into the upper part of these chambers;

On'the bottom of each chamber A, tubes or pipcs,.D, are securely fastened, closed at the bottom, and'projecting downwards into the fire and flame. Those tubes or pipes directly over the fireplace E are m'ade all of the same length, while those tubes situated in the combustion-chamber F, behind the bridge-wall G, are gradually increasing in length as they depart fronrthe fire. v V

Near the forward end of the chambereA, a brancli,'H, is provided, communicating with all the chambers, and to which a steam-chamber, J, is attached.

Near the after end of the chambers A, but in such a position as to come within the after brick wall 0,3 similar branch, L, is arranged, communicating with a water-chamber, K, the top of which is connectcdiwit-h the steam-chamber J by a pipe, M, for the purpose of equalizing the pressure in the same, and at the same time to allow the escape of any steam from that partot the generator.

The chambers A are placed in the hrick-worh, at a slight inclination, and form the top of the flue or tirechamber, and are supported in that position by suitable anger-bolts, e e, fastened to bars resting on the top 0? the brick-work.

The steam generated in the pipes D, as well as in the chambers A, rises upwards, and passes into the steam-chamber J, the several particles of steam being conducted in the desired direction by the inclined braces or partition-plates b, assisted by the inclined upward position of the chambers A, the steam passing into the chamber J, while the particles of water carried with the same will readily follow the circular ends of these chambers A, and pass back again below the iartitiompiatcs b, and as the water below said partition-plates b, exposed to the direct action of the fire, becomes of less specific gravity, it rises, and is replaced by the cooler current above said partition-plates, and a regular-and rapid circulation in these chambers is maintained. For the same purpose, a triangular tube is'inscrted into each of the suspended tubes D, (see Figure 1H,) the object of which is to direct two currents of water in the same, and to maintaina rapid circulation in each of them.

What I claim as my invention,: and desire to secure by Letters Patent, is-

1. The arrangement of a number of chambers, A, of an oval or circular section, with circular forward end, and strengthened by braces or division-platesb,inclined upwards, for thepurpose described, in combination with hanging tubes or pipes 'D, the whole being constructes'l in themanner and for the purpose substantially as set forth.

2. I claim the combination of the above-described chambers A,-'wit'h hanging pipes D, water-chamber K, steam-chamber J, and connectingipe M, when constructed and arranged substantially as described and specified.

JOHN F. ALLEN;

Witnesses:

HENRY E. Roxanna, WM. DERFEB. 

